As a tumour marker
<2 U/L
Source : Referal Laboratory
β -hCG rise in serum in a normal pregnancy:
- doubles every two days
- detectable within 24-48 hours after implantation
- peaks 10 weeks after last menstrual period
Ectopic pregnancy is associated with an impaired HCG production and an increase in serum B-hCG less than 66% over two days is predictive of ectopic pregnancy
